1 files changed, 2 insertions, 0 deletions
diff --git a/crypto/src/crypto/signers/Ed448phSigner.cs b/crypto/src/crypto/signers/Ed448phSigner.cs
index 8f451f9e8..d656c1392 100644
--- a/crypto/src/crypto/signers/Ed448phSigner.cs
+++ b/crypto/src/crypto/signers/Ed448phSigner.cs
@@ -75,6 +75,8 @@ namespace Org.BouncyCastle.Crypto.Signers
         {
             if (forSigning || null == publicKey)
                 throw new InvalidOperationException("Ed448phSigner not initialised for verification");
+            if (Ed448.SignatureSize != signature.Length)
+                return false;
 
             byte[] pk = publicKey.GetEncoded();
             return Ed448.VerifyPrehash(signature, 0, pk, 0, context, prehash);